The statement that we can infer about the study based on the finding that exercise enhances concentration, especially for students who participated in a yoga class rather than step aerobics, is that "there was an interaction in the results". Hence, the correct option to this question is C.
When the influence of one variable is dependent on the value of another, this is referred to as an "interaction effect". The results of ANOVA and regression models, as well as the designed experiments, are likely to include interaction effects. Interactions between two variables can be seen in the question related to the improvement of concentration in yoga compared to step aerobics.
Learn more about interaction in research here: brainly.com/question/28488334
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